Leap forward with GROHE''s new advanced Universal Rough-In System. Only the new GrohFlex system covers such a wide range of installation types - from single-showers to tub/shower combos to high-flow custom showers - with just one universal rough in. Plus, GrohFlex offers pressure balancing and thermostatic control options for both the master and secondary bath. And its smart design features easy, intuitive operation with all functions controlled from a single axis, reducing the need for separate volume controls and diverters.